Electric vulcanizer.



(No Nadel.)

Patsnted July 2, |90I.

A. .'x. connu. ELECTRIC VULCNIZER.

(Appuatiun am sept 1o, 1900.)

2 Sheets-Sheet I.

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Patented July 2, lm'.

A. J. NLIN.

'ELECTRIC VULCNIZER. u "mm @Pham med mi' m' Hoof) 2 sheets-sheet 2.

` UNITED STATES PATENT OFFICE.

ANDREW J. CONL'IN, OE4 CAMBRIDGE, MASSACHUSETTS, ASSICNOR To THE SIMPLEXELECTRICAL COMPANY, OE BOSTON, MASSACHUSETTS.

.ELECTRIC VULCANI'ZER.

SIPECILIICATIN forming partof Letters Patent No. 677,399, dated July 2,1901. y Application filed September 10,` 1960. Serial No. 29,543. (Nomodel.)

T dll whom, t may concern."

Be it known that I, ANDREW J. CONLIN, a citizen of the United States ofAmerica, and a resident of Cambridge, county of Middlesex, and State ofMassachusetts,have invented certain new and useful Improvements inElectric Vulcanizers, of which the following is a specication.

This invention relates to the vulcanization of rubber insulation forelectric wire by means of heat generated by electricity. Its object isto provide an apparatus whereby a perfect insulation may be made at thejunction of the ends of two wires by the union of new and old materialsunder the influence of heat generated by electricity. A uniformtemperature, which is essential to good vulcanizing and difficult toattain by means of steam-vulcanizers and other old forms of vulcanizers,is obtained y the use of my invention, as well asa device moreconvenientand simple in operation ythan those now in use, portable, and adaptedfor use out of doors and in places difficult of access, such astrenches. n

My vulcanizer consists of an electricallyheated tubular mold having anupper and aV lower Clamping ymember adapted to'receive anV insulatedwire. p

An embodiment of my invention is shown in the accompanying drawings, inwhich- Figure l is a front elevation of my electric vulcanizer. Fig'. 2isa vertical cross-section of my electric..vulcanizer through the line XXy in Fig. l, showing the upper clamping member in elevated position.Fig.,3 is an end elevation of my electric vulcanizer. Fig. 4 is adiagram of the electrical heater-coil in the upper clamping member ofthe vuloanizerr viewed from above. Fig. 5 is a diagram of the electricalheater-coil in the lower clampf ing member of the vulcanizer viewed fromabove; and Fig. 6` is a diagram ofthe rheostat in the base of themachine, which'controls the amount of heat in the lheating-coils, viewedfrom underneath. v

Like parts are indicated by like letters in all the figures.

A and B are the upper and lower members,

respectively, of a tubular mold adapted to receive insulated wire. Saidmembers A and B are filling-blocksy removably fitted into the twomembers C and D, respectively, of the clamp. Instead of usingfilling-blocks it is obvious that said members C and D may be so formedon theirinner faces as to serve as the mold; but it is preferable to useiillingblocks, so that molds may be used having different-sized boresadapted to receive dierent-sized wires.y The members ,C and D vof theclamp are journaled together at E, and the lower member D is mounted ona base F by ostat H, having the switch or lever I pivoted 'at J andadapted to sweep over'the'contactplates or segments jj. The lever I isconnected at J by the `wire dwith the bindingpost g.

d is a heater-coil embedded in the enamel 1c of the rheostat within thebase F.

The contact-plates17` 7' are provided with stems Z Z, which pass throughthe base F and the enamel 7e and are connected by the loops of the coila, as shown in Fig. 6.

The clamping members C and D are provided, respectively, with the springContact` members `o o and p p', wh'ich'oomplete the lcircuit around themold, as hereinafter described, when the clamping members C and D areclosed and break the circuit when it is opened. On the convex side ofsaid. clamping membersis a coating of enamel 7e and 7a2, in which areembedded the heater-coils c and b, respectively. Lids or covers M'andAN,se cured to the clamping members by small screws q q, protect theenamel Zo and k2 and alsoserve to retain the heat. g Theair-spacebetween said .lids and the clamping members to which they are attachedmaterially aids in their function of retaining the heat. clamping memberand its lid, as above described, forms a clamping part having an innerand an outer shell with an air-space between. n

Each

IOS

From the stem or post Z of the end segment j leads the wire e, whichpasses u pward'through the hole m in the base F and terminates at thepost e', Fig. 5. V From e' connection is made through the heater-coil b,contacts p and o, heater-coil c, contacts o and p', wire f, which passesfrom contact p downwardV through the v hole 'n in the base F tobinding-post h. The

wber, the latter being mounted upona base binding-posts Lh and g areprovided with the usual holes for receivingsthe lineLwires and screwsfor binding the'wires inplace.

The operation of my vulcanizer is as tol-v lows: The ends of therubber-insulated wires which it is desired to unite are scraped. bare oftheir insulation a snflicient length to er1:-

together.

portion ofA the, wire from which the insulation has been removed. f Tovulcanize this uncured insulation, the ,upper clamping member C israised', as shown in Fig. 2, and thewire is put between the membersAan-d B 'ofthe mold. The clamp is then closed, the pin Q is swung intothe notch in the lug P, and the screw Sv set firmly down upon lugP. Bythe closing of the clamp the contactso and p and oand p', respectively,are closed, and' thereby the y;

heating-coil circuit is closed. The amount of heat required to properlyvulcanize the rnbber can be ascertained by experiment and contr'olled bythe lever I of the rheostat in the base. F. The vulcanizer may be bui-1tfor a current of any standard numberof volts, and it' any other voltageis used a transformer may be employed.

The object inmounting the clamp u portaind in close proximity to therheostat inthe base is not only to providea convenient and com- 5 t;sisting of -two parts jo-urnaled together and means for vclamping said.parts togetl1er,eacl1 lof said clamping parts consisting of an inner andan outer'shel-l with an ai'rspa'ce between, i electrical heatingresistances on the enter side of the inner shells, a tubular moldwithin' pact means for controlling the current inthe heater-coils b andc,/`but the rheostat being itself a heater its heat is not wasted, butmaterially aids in warming the moldv and mainftaining it at an eventemperature.

ber, the lower member being mounted upon a base andy in close proximitythereto, a rheostat within said base, an electric heating-coil substanti all y surrounding said mold and' electrical connections betweenthe heating-,coil

and the rheostat.

2` In an electric-vulcanizer a tubular mold f What I c-lainnand desireto secureby Letfl having two clamping members, oneA of said membersbeing mounted upon a base and in close proximity thereto, a rheostatwithin said base, an electric heating-coil substantially surroundingsaid members, electric contacts borne by saidclamping members, andadapted to close" the heati-ngcircuit simultane ously with themechanical closing of the mold,

lelectrical connections between the heatings coil and the rheostat.

3. In an electric vulcanizer va tubular mold having an upper and a lowerclamping memand' in close proximity thereto, a rheostat within saidbase, 'anenamel heating-coil on the outer side of each of said members,covers adapted to protectfsaid enamel heating-coils,

` au tomatic'sprin-g-eontacts borneb-y said meml bers adapted toclosethe heatinghcircuit si' multaneously with the closing of the mold,

and electrical lconnections .between the VVrheoj' stat and theheating-coil.v Y Y 4. In an electricy vulcanizer a clam-poen# sisting oftwo parts journaled together 'and cachot said clam-ping parts, latubular mold removably fitted within said clamping parts,

i means for clamping said parts together, electrical heating resistanceson the onto-r side of spring-contact members borne by said cla1np in-gparts and adapted to close'the heating- ,coil circuit simultaneouslywith the closing l together of the clamps, anda rheostatr in closeproximity to said clamping parts and controlling the amount of heat inthe heating resistances. v t Y V 5. In anelectric vulcanizer, a clampcon#A sisting of two parts journaledtogether and A meansAfor'clampingsaid parts together, each j of said clamping partsconsisting of an inn-er and an outer shell with an air-space between,

electrical heating resistances-on theonter side' of the inner shells,and atnbularmoldY within jsaid clamp.

6. In an electric vulcanizen a clamp VconsaidV clamp, and a riieostat inclose proximity IOO to said clamping. parts, and con-trolling the amountof heat in the heating resistances.

Signed by me at Boston, ltiassachusetts, this 23d' day of August, 1900.

Witnesses :y FRANK S. HARTNETT, ROBERT CUsHMAN.

'ANDREW J. CONLIN.

